arch/mips/bcm47xx/setup.c

   1 /*
   2  *  Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
   3  *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
   4  *  Copyright (C) 2006 Michael Buesch <m@bues.ch>
   5  *  Copyright (C) 2010 Waldemar Brodkorb <wbx@openadk.org>
   6  *  Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  *  You should have received a copy of the  GNU General Public License along
  25  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26  *  675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include "bcm47xx_private.h"
  30
  31 #include <linux/export.h>
  32 #include <linux/types.h>
  33 #include <linux/ethtool.h>
  34 #include <linux/phy.h>
  35 #include <linux/phy_fixed.h>
  36 #include <linux/ssb/ssb.h>
  37 #include <linux/ssb/ssb_embedded.h>
  38 #include <linux/bcma/bcma_soc.h>
  39 #include <asm/bootinfo.h>
  40 #include <asm/idle.h>
  41 #include <asm/prom.h>
  42 #include <asm/reboot.h>
  43 #include <asm/time.h>
  44 #include <bcm47xx.h>
  45 #include <bcm47xx_nvram.h>
  46 #include <bcm47xx_board.h>
  47
  48 union bcm47xx_bus bcm47xx_bus;
  49 EXPORT_SYMBOL(bcm47xx_bus);
  50
  51 enum bcm47xx_bus_type bcm47xx_bus_type;
  52 EXPORT_SYMBOL(bcm47xx_bus_type);
  53
  54 static void bcm47xx_machine_restart(char *command)
  55 {
  56         printk(KERN_ALERT "Please stand by while rebooting the system...\n");
  57         local_irq_disable();
  58         /* Set the watchdog timer to reset immediately */
  59         switch (bcm47xx_bus_type) {
  60 #ifdef CONFIG_BCM47XX_SSB
  61         case BCM47XX_BUS_TYPE_SSB:
  62                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
  63                 break;
  64 #endif
  65 #ifdef CONFIG_BCM47XX_BCMA
  66         case BCM47XX_BUS_TYPE_BCMA:
  67                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
  68                 break;
  69 #endif
  70         }
  71         while (1)
  72                 cpu_relax();
  73 }
  74
  75 static void bcm47xx_machine_halt(void)
  76 {
  77         /* Disable interrupts and watchdog and spin forever */
  78         local_irq_disable();
  79         switch (bcm47xx_bus_type) {
  80 #ifdef CONFIG_BCM47XX_SSB
  81         case BCM47XX_BUS_TYPE_SSB:
  82                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
  83                 break;
  84 #endif
  85 #ifdef CONFIG_BCM47XX_BCMA
  86         case BCM47XX_BUS_TYPE_BCMA:
  87                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
  88                 break;
  89 #endif
  90         }
  91         while (1)
  92                 cpu_relax();
  93 }
  94
  95 #ifdef CONFIG_BCM47XX_SSB
  96 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
  97 {
  98         char prefix[10];
  99
 100         if (bus->bustype == SSB_BUSTYPE_PCI) {
 101                 memset(out, 0, sizeof(struct ssb_sprom));
 102                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 103                          bus->host_pci->bus->number + 1,
 104                          PCI_SLOT(bus->host_pci->devfn));
 105                 bcm47xx_fill_sprom(out, prefix, false);
 106                 return 0;
 107         } else {
 108                 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
 109                 return -EINVAL;
 110         }
 111 }
 112
 113 static int bcm47xx_get_invariants(struct ssb_bus *bus,
 114                                   struct ssb_init_invariants *iv)
 115 {
 116         char buf[20];
 117
 118         /* Fill boardinfo structure */
 119         memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
 120
 121         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
 122
 123         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 124         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 125
 126         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 127                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 128
 129         return 0;
 130 }
 131
 132 static void __init bcm47xx_register_ssb(void)
 133 {
 134         int err;
 135         char buf[100];
 136         struct ssb_mipscore *mcore;
 137
 138         err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
 139         if (err)
 140                 printk(KERN_WARNING "bcm47xx: someone else already registered"
 141                         " a ssb SPROM callback handler (err %d)\n", err);
 142
 143         err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
 144                                       bcm47xx_get_invariants);
 145         if (err)
 146                 panic("Failed to initialize SSB bus (err %d)", err);
 147
 148         mcore = &bcm47xx_bus.ssb.mipscore;
 149         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 150                 if (strstr(buf, "console=ttyS1")) {
 151                         struct ssb_serial_port port;
 152
 153                         printk(KERN_DEBUG "Swapping serial ports!\n");
 154                         /* swap serial ports */
 155                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 156                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 157                                sizeof(port));
 158                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 159                 }
 160         }
 161 }
 162 #endif
 163
 164 #ifdef CONFIG_BCM47XX_BCMA
 165 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
 166 {
 167         char prefix[10];
 168         struct bcma_device *core;
 169
 170         switch (bus->hosttype) {
 171         case BCMA_HOSTTYPE_PCI:
 172                 memset(out, 0, sizeof(struct ssb_sprom));
 173                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 174                          bus->host_pci->bus->number + 1,
 175                          PCI_SLOT(bus->host_pci->devfn));
 176                 bcm47xx_fill_sprom(out, prefix, false);
 177                 return 0;
 178         case BCMA_HOSTTYPE_SOC:
 179                 memset(out, 0, sizeof(struct ssb_sprom));
 180                 core = bcma_find_core(bus, BCMA_CORE_80211);
 181                 if (core) {
 182                         snprintf(prefix, sizeof(prefix), "sb/%u/",
 183                                  core->core_index);
 184                         bcm47xx_fill_sprom(out, prefix, true);
 185                 } else {
 186                         bcm47xx_fill_sprom(out, NULL, false);
 187                 }
 188                 return 0;
 189         default:
 190                 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
 191                 return -EINVAL;
 192         }
 193 }
 194
 195 static void __init bcm47xx_register_bcma(void)
 196 {
 197         int err;
 198
 199         err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
 200         if (err)
 201                 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);
 202
 203         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 204         if (err)
 205                 panic("Failed to initialize BCMA bus (err %d)", err);
 206
 207         bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
 208 }
 209 #endif
 210
 211 void __init plat_mem_setup(void)
 212 {
 213         struct cpuinfo_mips *c = &current_cpu_data;
 214
 215         if (c->cputype == CPU_74K) {
 216                 printk(KERN_INFO "bcm47xx: using bcma bus\n");
 217 #ifdef CONFIG_BCM47XX_BCMA
 218                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 219                 bcm47xx_register_bcma();
 220                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 221 #endif
 222         } else {
 223                 printk(KERN_INFO "bcm47xx: using ssb bus\n");
 224 #ifdef CONFIG_BCM47XX_SSB
 225                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 226                 bcm47xx_register_ssb();
 227                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 228 #endif
 229         }
 230
 231         _machine_restart = bcm47xx_machine_restart;
 232         _machine_halt = bcm47xx_machine_halt;
 233         pm_power_off = bcm47xx_machine_halt;
 234         bcm47xx_board_detect();
 235         mips_set_machine_name(bcm47xx_board_get_name());
 236 }
 237
 238 static int __init bcm47xx_cpu_fixes(void)
 239 {
 240         switch (bcm47xx_bus_type) {
 241 #ifdef CONFIG_BCM47XX_SSB
 242         case BCM47XX_BUS_TYPE_SSB:
 243                 /* Nothing to do */
 244                 break;
 245 #endif
 246 #ifdef CONFIG_BCM47XX_BCMA
 247         case BCM47XX_BUS_TYPE_BCMA:
 248                 /* The BCM4706 has a problem with the CPU wait instruction.
 249                  * When r4k_wait or r4k_wait_irqoff is used will just hang and
 250                  * not return from a msleep(). Removing the cpu_wait
 251                  * functionality is a workaround for this problem. The BCM4716
 252                  * does not have this problem.
 253                  */
 254                 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
 255                         cpu_wait = NULL;
 256                 break;
 257 #endif
 258         }
 259         return 0;
 260 }
 261 arch_initcall(bcm47xx_cpu_fixes);
 262
 263 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
 264         .link   = 1,
 265         .speed  = SPEED_100,
 266         .duplex = DUPLEX_FULL,
 267 };
 268
 269 static int __init bcm47xx_register_bus_complete(void)
 270 {
 271         switch (bcm47xx_bus_type) {
 272 #ifdef CONFIG_BCM47XX_SSB
 273         case BCM47XX_BUS_TYPE_SSB:
 274                 /* Nothing to do */
 275                 break;
 276 #endif
 277 #ifdef CONFIG_BCM47XX_BCMA
 278         case BCM47XX_BUS_TYPE_BCMA:
 279                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 280                 break;
 281 #endif
 282         }
 283         bcm47xx_buttons_register();
 284         bcm47xx_leds_register();
 285
 286         fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
 287         return 0;
 288 }
 289 device_initcall(bcm47xx_register_bus_complete);